Abstract: New x-ray detectors capture information about the energy of detected photons. This detected spectral information can be used to differentiate materials based on composition, which has shown promise for improved imaging of contrast agents. The spectral information can also improve the quality of conventional CT images. However, spectral CT is currently limited by nonideal detector effects. This talk will present an overview of spectral CT imaging, as well as our work in overcoming the limitations of photon-counting detectors to realize the benefits of spectral CT.